Lamp



FIG. 1 is an upper-front perspective view of a lamp;

FIG. 2 is a front view of the lamp of FIG. 1;

FIG. 3 is a top view of the lamp of FIG. 1; and,

FIG. 4 is a side view of the lamp of FIG. 1. 

The ornamental design for a lamp, as shown and described. 